If I thought there was ANY likelihood or breaking a spoke on a daily commute, I'd replace the wheels. Wheels can and do go thousands and even 10s of thousands of miles without breaking spokes.
So while carrying spare spokes might make sense for an extended multi-day tour, especially where services are minimal, it doesn't make sense for anything shorter, including long day or weekend rides. You might carry a spoke wrench so you can do some corrective truing, just in case, but I don't bother with that either.
I've been trusting my wheels for almost 50 years and they've never let me down.
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